<script setup>
import { userRegisterService } from '@/api/user.js'
import { userLoginService } from '@/api/user.js'
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'
import { useUserStore } from '@/stores/modules/user.js'
import router from '@/router' //导入router可以直接用
const isRegister = ref(false)

const form = ref()

//整个用于提交的数据对象
const formModel = ref({
  username: '',
  password: '',
  repassword: ''
})

//切换时重置表单,监控isRegister
watch(isRegister, () => {
  formModel.value = {
    username: '',
    password: '',
    repassword: ''
  }
})

//整个表单校验规则
//1.非空校验
//2.长度校验
//3.正则校验 pattern
//4.自定义校验 validator => (rule value callback)
const rules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' }, //最后一句是指失焦时校验,change是改变校验
    { min: 5, max: 10, message: '用户名必须是 5-10位 的字符', trigger: 'blur' } //长度校验
  ],
  password: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    {
      //正则校验
      pattern: /^\S{6,15}$/,
      message: '密码必须是6-15位非空字符',
      trigger: 'blur'
    }
  ],
  repassword: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    {
      //正则校验
      pattern: /^\S{6,15}$/,
      message: '密码必须是6-15位非空字符',
      trigger: 'blur'
    },
    {
      validator: (rule, value, callback) => {
        //判断输入密码与上次是否一致
        if (value !== formModel.value.password) {
          callback(new Error('俩次输入密码不一致'))
        } else {
          callback() //校验成功也需要callback
        }
      },
      trigger: 'blur'
    }
  ]
}

const register = async () => {
  //表单预校验，点击注册
  await form.value.validate()
  await userRegisterService(formModel.value) //传入注册表单内容，获取回调
  ElMessage.success('注册成功')
  isRegister.value = false
}

const userStore = useUserStore()
const login = async () => {
  //使用api获取信息
  await form.value.validate()
  const res = await userLoginService(formModel.value) //传入注册表单内容，获取token
  userStore.setToken(res.data.token)
  ElMessage.success('登录成功')
  router.push('/')
}
</script>

<template>
  <!-- 
    1.结构相关
        el-row表示一行，一行分成24份
        el-col表示列
        (1):span='12' 表示在一行中，占12份（50%）
        (2):pan='6'   表示在一行中，占6份（25%）
        (3):offset="3"  代表在一行中，左侧margin份数

        el-form 整个表单组件
        el-form-item 表单的一行（一个表单域）
        el-input 表单元素（输入框） 
    2.校验相关
    （1）el-from => :model ="ruleFrom",绑定整个表单的数据对象       
    （2）el-from => :rules = "rules"，绑定rules的规则对象
    (3)表单元素 => v-model = "ruleFrom.xxx"给表单元素，绑定from的子属性
    （4）el-item => prop配置生效的是哪个校验规则（和rules中的字段要对应）
     -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册相关表单 -->
      <el-form
        :model="formModel"
        :rules="rules"
        ref="form"
        size="large"
        autocomplete="off"
        v-if="isRegister"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="formModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="formModel.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
            v-model="formModel.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="register"
            class="button"
            type="primary"
            auto-insert-space
          >
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <!-- 登陆相关表单 -->
      <el-form
        ref="form"
        :model="formModel"
        :rules="rules"
        size="large"
        autocomplete="off"
        v-else
      >
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="formModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="formModel.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="login"
            class="button"
            type="primary"
            auto-insert-space
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background:
      url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
